Gooseneck –
Spout connecting a metal pot or chamber with a nozzle or sprue hole in the die and containing a passage through which molten metal is forced on its way to the die. It is the metal injection mechanism in a hot chamber type of die casting machine.

Growth –
Expansion of a casting as a result of aging or of intergranular corrosion, or both.

Impression –
Cavity in a die. Also, the mark or recess left by a ball, or penetrator of a hardness tester.

Ingot –
Metal or alloy cast in a convenient shape for storage, shipping and remelting.

Injection –
The process of forcing molten metal into a die.

Insert –
A piece of material, usually metal, which is placed in a die before each shot. When molten metal is cast around it, it becomes an integral part of the die casting.

Intergranular corrosion –
A type of corrosion which preferentially attacks grain boundaries of metals or alloys, resulting in deep penetration.

Loose piece, knockout –
A type of core (which forms undercuts) which is positioned in, but not fastened to a die. It is so arranged as to be ejected with the casting and from which it is removed. It is used repeatedly for the same purpose.

Metal saver –
Core used primarily to reduce amount of metal in a casting and to avoid sections of excessive thickness.

Multiple cavity die –
A die having more than one duplicate impression.

Nozzle –
Outlet end of a gooseneck or the tubular fitting which joins the gooseneck to the sprue hole.

Overflow-well –
A recess in a die connected to a die cavity by a gate to assist in proper venting.

Parting line –
A mark left on a die casting where the die halves meet; also, the mating surface of the cover and ejector portions of the die.